O. Calculator.cpp

//O. Calculator
#include <iostream>
using namespace std;

int main ()
{
    int a, b;
    char s;

    cin >> a >> s >> b;
    switch (s)
    {
        case '+':
            cout<< a+b;
            break;

        case '-':
            cout << a-b;
            break;

        case '*':
            cout << a*b;
            break;

        case '/':
            cout << a/b;
            break;

        default:
            break;


    }


    return 0;
}